Essays Tagged: "particles"

Chemical reactions

firsts to speculate on the composition of matter. They thought that it was possible that individual particles made up matter.Later, in the Seventeenth Century, a German chemist named Georg Ernst Stahl ... ns. He said that all gasses at the same pressure, volume and temperature contain the same number of particles. This idea took a long time to be accepted. His ideas lead to the subscripts used in the f ...

(8 pages) 210 0 4.1 Mar/2002

Subjects: Science Essays > Chemistry

Water Transitions

h of one percent is readily available.Freshwater is not pure in that it contains minerals and other particles. There arenumerous plants and animals that depend on freshwater for their lives. Humans ar ... iddle of theocean(Stuller 30). To begin with, freshwater traveling towards the sea carries suspendedparticles. As the particles make contact with saltwater, an electrochemical reactioncalled flocculat ...

(3 pages) 55 0 4.5 Nov/1996

Subjects: Science Essays > Chemistry

A resistance Investigation

iction:Investigation 1) I predict that as the wire increases in length the resistance (collision of particles causing a decrease in velocity for the moving particle) will increase, I think this will h ... current.Investigation 2)I predict that as the wire diameter increases the resistance (collision of particles causing a decrease in velocity for the moving particle) will increase, I think this will h ...

(24 pages) 176 2 4.2 Apr/2002

Subjects: Science Essays > Physics

Lasers

orange, and red. These make up the visible part of theelectromagnetic spectrum. Light is made up of particles, called PHOTONS,which travel in waves. The difference in the colour depends on thewaveleng ... herefore each medium produces differentcoloured light. When the energy, in this case photons (light particles) enterthe medium they smash into the atoms of the medium. The atom then releasesanother ph ...

(4 pages) 66 0 4.6 Feb/1996

Subjects: Science Essays > Physics

Laser, What its all about and made of

orange, and red. These make up the visible part of theelectromagnetic spectrum. Light is made up of particles, called PHOTONS,which travel in waves. The difference in the colour depends on thewaveleng ... herefore each medium produces differentcoloured light. When the energy, in this case photons (light particles) enterthe medium they smash into the atoms of the medium. The atom then releasesanother ph ...

(4 pages) 88 0 3.6 Apr/2002

Subjects: Science Essays > Technology

Albert Einstein

eoretical paper was on Brownian motion. The paperdiscussed the significant predictions I made about particles that are randomlydistributed in a fluid. My next paper was on the photoelectric effect, wh ... ature of light. I proposed thatunder certain circumstances light can be considered as consisting of particles,and I also hypothesized that energy carried by any light particle, called aphoton, is prop ...

(3 pages) 57 2 3.9 Jan/1996

Subjects: Science Essays > Physics

Osmosis and Diffusion Lab

ab was to observe the rate of osmosis and diffusion, as well as the effect of molecular size of the particles on this rate. Part I of the lab was a demonstration of osmosis and diffusion, that dealt w ...

(9 pages) 300 1 4.7 Nov/1996

Subjects: Science Essays > Biochemistry

Tjis essay explains the evolution of the atomic theory and how it has changed over the last cenutry or so.

s combine in a specific proportion tocreate hydrochloric acid. Dalton thought that atoms were small particles,like a small marble. Dalton's atomic theory consisted of three parts. Theywere:*All substa ... atomic theory consisted of three parts. Theywere:*All substances are made of atoms. Atoms are small particles that cannotbe created, divided, or destroyed.*Atoms of the same substance are exactly alik ...

(2 pages) 48 1 3.0 Jun/2002

Subjects: Science Essays

for this essay I investigated Ohms Law. I investigated the effect that the length and the thickness of wire had on the resistance.

rease. This is because if the wire is increased from 10cm to 20cm the electrons will have more wire particles to collide with.I.E ?10 cm 20 cmii.As with all solids, liquids and gases, if the wire is h ... o collide with.I.E ?10 cm 20 cmii.As with all solids, liquids and gases, if the wire is heated, the particles will gain more energy and will move faster. Due to this the electrons will collide with th ...

(7 pages) 111 0 4.6 Aug/2002

Subjects: Science Essays > Physics

What happens to sodium thiosulphate when it is added to hydrochloric acid? How does the concentration effect the amount of sulphar produced?

on top. The higher the concentration of thiosulphate the quiker the reaction becuase there are more particles to react.The different concentrations of thiosulphate must be poored separetly into the co ...

(1 pages) 35 0 2.0 Nov/2002

Subjects: Science Essays > Chemistry

This is an essay I did on explaining how gravity works as well as how it effects the tides... How high tide and low tide work

uction"Gravity is a force of attraction that exists between any two masses, any two bodies, any two particles. Gravity is not just the attraction between objects and the Earth. It is the attraction th ...

(5 pages) 105 0 5.0 Jan/2003

Subjects: Science Essays > Earth Sciences > Oceanography

Biochemical warfare

damage this way. Also Chemicals can react to the skin causing a rash and irritating the skin. These particles can even affect the smallest body wounds. Even small cuts from shaving can be affect by th ...

(5 pages) 67 0 3.4 Feb/2003

Subjects: Law & Government Essays > Military & International Conflicts & Security

Pollution

. The pollution that harms our respiratory system is known as particulate, they are the small solid particles that we can see through the ray of sunlight. Particulate are products of incomplete combus ... echanical precipitators. These method collected at maximum efficiency of 96.7% pollution, but small particles could still escapes.Do most of the toxic particles come back to Earth?Yes and no, because ...

(7 pages) 93 0 5.0 Apr/2003

Subjects: Science Essays > Earth Sciences > Geography

Acid Rain and the effects on the environment.

t acid deposition is acidic rain, fog and snow, sleet or hail. Dry acid deposition refers to acidic particles or acidic gases.Acid rain is measured on a point system of 0 to 14.0=maximum acidity7=neut ...

(2 pages) 89 3 4.2 Apr/2003

Subjects: Science Essays > Earth Sciences

Outline for Dalton and his work in Chem(outline only).

m of the partial pressures of the component gasesDalton's Atomic Theory*Matter consists of definite particles called atoms.*Atoms are indestructible. In chemical reactions, the atoms rearrange but the ... other properties.*When atoms of different elements combine to form compounds, new and more complex particles form. However, in a given compound the constituent atoms are always present in the same fi ...

(3 pages) 66 1 3.0 May/2003

Subjects: Science Essays > Chemistry

The green house effect, ozone depletion, and soil salinity and degradeation.

the lower atmosphere and surface of the planet by a complex process involving sunlight, gases, and particles in the atmosphere. The amount of heat-trapping atmospheric gases, called greenhouse gases, ... s from the lands and seas strike certain substances in the atmosphere, such as greenhouse gases and particles, those substances absorb the rays. As a result, the gases and particles are heated. They t ...

(5 pages) 129 0 4.3 Jun/2003

Subjects: Science Essays > Environmental Science

Investigating Some Factors Which Affect the Rate of Reaction.

Using a gas syringe, the volume of gas given off during an experiment can be measured.In order for particles to react, they must be colliding with each other with a sufficient impact. This is known a ... own as the Collision Theory. To increase the rate of reaction, the number of collisions between the particles must increase. This can be done in a number of ways:·Temperature - Higher temperatu ...

(3 pages) 69 0 4.8 Oct/2003

Subjects: Science Essays > Chemistry

"Electron Microscopes" - Electron Microscopes (EMs) are scientific instruments that use a ray of electrons to examine small matter on a very fine scale.

is how the surface appears, for example the texture.*Morphology; this is the shape and size of the particles that make up the matter.*Composition; this is the elements and the compounds the matter is ...

(3 pages) 49 3 4.8 Oct/2003

Subjects: Science Essays > Biology

Phases of matter and vapor pressure.

vice versaoSolid- liquidoLiquid- gasoSolid - gasSolidsThe physical state of matter characterized by particles that appear to vibrate about fixed points. Particles of a solid (crystalline) are arranged ... id (crystalline) are arranged in a compact, three dimensional pattern called a lattice. Because the particles of a solid are held together y strong attractive forces, solids have a definite shape and ...

(4 pages) 29 0 2.0 Nov/2003

Subjects: Science Essays > Chemistry

Chemical reations is an essay on chemical reactions in Chemistry.

firsts to speculate on the composition of matter. They thought that it was possible that individual particles made up matter.Later, in the Seventeenth Century, a German chemist named Georg Ernst Stahl ... ns. He said that all gasses at the same pressure, volume and temperature contain the same number of particles. This idea took a long time to be accepted. His ideas lead to the subscripts used in the f ...

(8 pages) 124 2 4.5 Nov/2003

Subjects: Science Essays > Chemistry